Question

A=1/2+1/4+1/8+1/16+1/32.Tìm A

Answer 1

31/32 

tích nha

Answer 2

\(\Rightarrow A=\left(1-\frac{1}{2}\right)+\left(\frac{1}{2}-\frac{1}{4}\right)+\left(\frac{1}{4}-\frac{1}{8}\right)+\left(\frac{1}{8}-\frac{1}{16}\right)+\left(\frac{1}{16}-\frac{1}{32}\right)\)

\(=1-\frac{1}{32}\)

\(=\frac{31}{32}\)

Vậy...

Answer 3

= 31/32

Answer 4

\(A=1-\frac{1}{2}+\frac{1}{2}-\frac{1}{4}+\frac{1}{4}-\frac{1}{8}+\frac{1}{8}-\frac{1}{16}+\frac{1}{16}-\frac{1}{32}\)

\(A=1-\frac{1}{32}\)

\(A=\frac{31}{32}\)